Investigators found two fully functional pipe bombs in the three-week search for suspected cop killer Eric Matthew Frein, Pennsylvania State Police Lt. Col. George Bivens said Tuesday.
The pipe bombs were among items recovered that “undoubtedly confirms” Frein’s presence in the wooded area, Bivens said.
The self-taught survivalist suspected of killing one state trooper and wounding another planned the ambush for months, police have said.
Authorities have yet to corner Frein in a wooded area around the border of Pike and Monroe counties.
The suspect has the advantage of knowing the terrain where he is hidden, but police say his head start is fleeting.
Frein is being sought in the death of Cpl. Byron Dickson in a September 12 ambush outside the state police barracks in Blooming Grove. He is also suspected of wounding another officer.
He is still considered armed and dangerous, and police have found several items that Frein had either abandoned or hidden, he said.